Door-check



(No Model.) A

C. P. GRANDEMAN.

DOOR CHECK.

Patented Jan. 19, 1892.

linnen STATES- yPATENT Frrcn.

CHARLES F. GRANDEMAN, OF BROOKLYN, NEW YORK.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 467,165, dated January 19, 18972.

Application sied May 14vl 1890.

To @ZZ whom it may concern:

Be it known that I, CHARLES F. GRANDE- MAN, of Brooklyn, Kings county, and State 0f New York, have invented a certain new and useful Improvement in Door-Chains, of which the following is a specification.

This improvement relates to chains such as are used in connection with street-doors of houses for the purpose of allowing them to be partially opened and yet holding them securely against being opened to any great eX- teut. l

It has often happened that when doors have been Opened to the extent permitted by the chains persons from the outside have forcibly effected an entrance by breaking or cutting the chains.

The object of my improvement is to provide for simply opening the door sufficiently to allow conversation to be carried on by persons on opposite sides of the door and .yet to prevent the door from being opened to an eX- tent to allow of the introduction of any instrument which could be employed to break or cut the chain.

The improvement consists in the combination, with an ordinary plate provided with a slot through which the button of a chain may be slid and an opening at the end of the slot from which said button may be removed, of a catch for holding the button in that portion of the slot adjacent to the said opening. Preferably this catch will be a spring-catch.

In the accompanying drawings, Figure lis a front view of a chain and its appurtenances embodying my improvement. Fig. 2 is a horizontal section 0f the same. Fig. 3 is a horizontal section showing the parts in a different position. Fig. 4 is a vertical section taken at the plane of the dotted line x Fig. 1.

Similar letters of reference designate corresponding parts in all the figures.

A designates a chain, which, as here shown, is fastened in the usual manner to aplate B. This plate B may be of any suitable construction, and, as usual, is fastened to a door or door-casing by means of screws. At the free end of the chain is a button or bolt O. The plate B may be notched to receive this button when the chain is not in use.

D designates a plate having a raised portion extended longitudinally between the top Serial No. 351,739. (No model.)

and bottom edges. This portion is provided with a longitudinal slot d, which terminates at one end in an opening d of sufficient size to permit of the introduction of the button C. The button O has grooves in its opposite sides, which permit it after it shall have been introduced into the opening d to be slid along the slot cl. The edgesof the slot engage with the grooves and preclude the removal of the button, eircept it first be slid into the opening d. This plate D is intended to be fastened to a door by means of screws in the usual manner.

All of the parts which I have described in connection with the drawings are old. I will now describe the novelty in which my improvement resides..

E designates a catch, here shown as consisting of a piece of resilient metal having the shank fastened to the door and bent forwardly so as to form a projection e, which will bear against or lie close to the inner edges of the slot d in the plate D and beyond this bent backward to form a recess c sufficiently large for accommodating the ybutton C. The extremity of the strip of metal is bent outward through the openin g CZ of the plate D. Obviously this catch might be secured to the plate D and might be differently constructed to subserve the same purpose. Vhen the button is slid toward the opening c of the plate E sufficiently far for the projection or catch e to move outward behind it, the button will be held against moving far into the slot, and when the button is so held the door cannot be opened, exceptI j ust enough to render voices audible to persons on opposite sides of thel door. -By moving the button still farther and completely into the opening d it may be detached from the plate D. If it be desired to allow the button to move farther into the slot d of the plate D to permit of the wider opening of the door, the outwardly-projecting eX- tremity of the spring-strip E may be pressed toward the door, whereupon the projection or catch c will be disengaged from the button and the latter may be usedin connection with the plate D. It will be seen that the projection c and also the wall at the end of the slot d form stops to limit the movement of the button in one direction, the stop e being a movable one.

TOO

It will be seen that by my improvement I do l not seriously add to the expense of a (loon chain and yet render it; -very much move se- Cure.

That I Claim as my invention, and desire t0 secure by Letters Patent, is

The combination, with a door-chain, a but- `ton thereon, and e plate provided with L slot having an enlarged opening at one end and the Wall at the other end of the slot forming a stop for the button, of L movable stop oon- 

